I plan on making interpreters for about 10 different languages, starting with brainfuck and Befunge, and going onto more practical ones, like Lisp. I'll work onthis whenever I have time, cause it's fun and a great learning experience.
To run the brainfuck interpreter, just type "python brainfuck.py [FILENAME]". where the filename parameter is optional. If you don't add a file name, the program will run as an interactive brainfuck shell.